Intake Air Temperature (IAT) Sensor

DESCRIPTION:
The Intake Air Temperature (IAT) sensor is used to determine the EPC pressure. It also provides the electronic fuel injection system with mixture (fuel and air) temperature information. The IAT is used both as a density corrector for airflow calculation and to proportion the cold enrichment fuel flow. This sensor is similar in construction to the Engine Coolant Temperature (ECT) sensor, except it is packaged to improve sensor response time.

SYMPTOMS:
Incorrect EPC pressure either high or low resulting in either harsh or soft shifts.

DIAGNOSTIC TROUBLE CODES:
P0112, P0113, P0114